Bolt-cutter head



t e e h S .W. e e h S 2 D N W LR IE W T w H L W0 B (No Model.)

Patented Sept. 9, 1890.

(No Model.) 2 Sheets-Sheet 2.

'W. H. WILSON. BOLTAGUTTER HEAD;

No. 435,991. Patented Sept. 9, 1890;

T lmmml UNITED STATES PATENT OFFICE.

WILLIAM H. wILsoN, or FREMONT, OHIO.

BOLT-CUTTER -H EAD.

SPECIFICATION forming part of Letters Patent No. 435,991, dated September 9, 1890.

Application filed hpril25, 1890.

To all whom it may concern.-

. Be it known that 1, WILLIAM H. WILsoN, a resident of Fremont, in the county of Sandusky, State of Ohio, a citizen of the United States, have invented a new and useful Improvement in Bolt-Cutter Heads, of which the following is a specification.

My invention relates to a locking device used in an adjustable bolt-cutter head for the purpose of holding the die-sleeve and locking-sleeve in a relative position to each other and to prevent the slipping back of the diesleeve and displacement of the threadingdies.

That my invention maybe seen and fully understood, reference is had to the follow ing specification and annexed drawings, in which Figure 1 is an exterior side view of the head before referred to. Fig. 2 is a face view of Fig. 1. Fig. 3 is a longitudinal section of the said head with the cutters or dies inserted and open, showing the position of the locking device when the dies are open. Fig. 1 is a partial central section of the head, the dies, and the means for guiding them. Fig. 5 is a partial exterior View of the die or cutter head and sectional view of parts connected therewith. Fig. 6 represents a longitudinal,v

central section of the head with the dies closed. Fig. 7 is a face view of Fig. 6. Fig. 8 is a central longitudinal section on line mm of Fig. 7, showing the position of the locking device when the dies are closed. Fig. 9 is a detail view of the inner side of the die-sleeve into which the dies slide.

Like letters of reference denote like parts in the drawings and specification.

The head consists of a barrel A, die-sleeve B, locking-sleeve G, shifter D, studs E E, and various other parts of less importance, hereinafter referred to in their arrangement with the mechanism of the head. The barrelA is provided at one endwith a flange a, by means of which said barrel is attached to the revolving spindle of the machine with which the screw-cutting head is to be used, and in the free end thereof is arranged a series of slots b, Figs. 1 and 5, for the reception of the cutters F F F F, andshown therein in Figs. 2, 4, 6, and 7. As shown in the drawings, said slots 12 are made up by means of grooves in Serial No. 349,541. (No model) the barrel A and the following-ring G, which is held securely to the barrel by the screws H, Figs. 2 and 3.

Fitted to the exterior of the barrelA is the die-sleeve B, having inclined grooves c in open relation with the bore thereof, and circular enlargements at the inner side of said grooves which correspond with the head of the dies or cutters F to allow of a sliding movement. The inclination of the circular terminals of the grooves c renders the cutters adjustable within the slots b-that is, the cutters or dies will open or close according to the direction in which the sleeve B is moved.

In Fig. 4 the sleeve Bis shown moved backward, which draws the cutters F outwardly. In Fig. 6 saidsleeve has carried the cutters inwardly while being moved forward to a point even, or nearly so, with the free end of the barrel. The die-sleeve B is connected with the sleeve 0 by means of the screws I, (shown in Figs. 1 and 5,) which sleeve is actuated by the shifter D, Figs. 1 and 3. The shifter D is pivoted to a fixed point of the apparatus, while the pins 6 engage in the annular recess f of the sleeve 0, and thus carry the latter with it when the position of the shifter is changed. Simultaneously while moving the die-sleeve B said sleeve 0 actuates alocking device consisting of the studs E E and the notches J J in combination with the sleeve 0 and die-sleeve B. One end of the studs E E is oval in form and is seated in a depression K, Fig. 9, said depression being in the ends of the blocks S, which are integral parts of the screws 0 0, Figs. 3 and 8, which pass through the die-sleeve B. The other end is seated in the sleeve 0, and is of the shape or form shown in Figs. 3 and 8that is, the inner side or side which is in contact with the barrel A is of a shape conforming with the shape of the notch J, so that when the end slips into the notch J, as it does when the sleeve 0 is carried forward in the manner hereinbefore mentioned, the studs E E will have a direct bearing upon the side of the notches J J. The other end of the studs being seated in the depressions K K in the blocks S S, the sleeve B is held firmly in the position shown in Fig. 8 until the sleeve 0 is thrown back by the shifter D being actuated by the handle R. The studs E E are then carried back with the sleeve C,thedie-sleeve Bfollowing the locking-sleeve G by means of the screws I, Fig. 5, passing through the sleeve B and screwed into the sleeve C, therebyconnecting the two sleeves C and B. The connection, however, is rendered adjustable, resultant from the resilien cyof two springs, one of which is shown at N, Fig. 5. The adj Listing-screws O O, forming an integral part of the blocks S S, in which are the depressions K K, the seats of the studs E E are threaded into the die sleeve B and adjusted according to the size of the bolt or article to be threaded or cut. The farther the die-sleeve B is moved toward the free end of the barrel A the closer the cutters will be moved to each other, and vice versa. The studs E E, being in constant contact with the blocks S S of the set-screws O 0 when broughtto bear on the notches J J, hold the die-sleeve Bin a locked condition so long as the sleeve C is left to hold the studs E E in the notches J J. The contact of the blocks S S and the studs E E is induced by two springs, one being shown at N, on the screw I, Fig. 5, acting within their respective countersinks i in the sleeve B, Fig. 5.

I am aware that a screw-cutter d ie-head has been invented embracing features analogous to those herein set forth.

The distinguishing feature in my invention, and a very essential feature, is the locking device consisting of the studs E E, in combination with the notches J J, locking-sleeve O, and die-sleeve B, in connection with the diecutter.

I do not claim, broadly, the invention of a screw-cutting die-head, but an improved attachment thereto.

\Vhat I claim, and desire to secure by Letters Patent, is

1. In a screw-cuttin g die-head, a lockin g device consisting of the combination of the studs E E, the blocks S S, and the angular notches J J, said blocks S S being integral parts of the adjusting-screws O O in the die-sleeve B and having depressions K in the face thereof, said studs E E having one; end seated in the depressions K, the other end conformingin shape with angular notches J J in the barrel A and seated in the sleeve 0, operating eonjointly with the diesleeve l3, and the locking-sleeve C, substantially in the manner and for the purpose set forth.

2. In alocking device connected with a screwcutting die-head, the combination, with the die-sleeve and locking-sleeve, of studs E E, having one end seated in depressions in blocks which form integral parts of the adjustingscrews, the other end being of a shape conforming with angular notches in the barrel and seated in the locking-sleeve, and the notches in the barrel, arranged and operating substantially in the manner and for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

\VILLIAM II. WILSON.

Witnesses:

L. S. McGoNNLEv, F. O. ARNETT. 

